What is the car line?

The car line is a kind of connecting line inside the car, which can be used for current transmission of batteries, instruments, lamps and the like. The requirements of the car line will be biased towards cold and high temperature. If the inferior compound is no way to meet this requirement.

The car lines are all copper multi-core cords, and several or even dozens of soft copper wires are wrapped in plastic insulated tubes (PVC), which are soft and not easily broken. 

The characteristics and types of automotive wires

There are two kinds of automobile wires: high-voltage wire and low-voltage wire. Both are processed by copper multi-core cord. The cross-sectional area of the wire is mainly selected according to its operating current. 

For electrical appliances with small currents, in order to ensure that the conductors should have a certain mechanical strength, the cross-sectional area of the conductors shall not be less than 0.5 mm2. Since the starter is short-term work, in order to ensure that the starter can send enough power when it works normally, the voltage drop generated by the current per 100A on the line cannot exceed 0.1v-0.15v. 

Therefore, the cross-sectional area of the wire used is large. The high-voltage wire of the automobile has a very high withstand voltage, generally should be above 15kv, so its cross-sectional area is small (because the current is very small), about 1.5mm2, the thickness of the insulation layer is much lower than that of the lower pressure line, and rubber insulation is used, plus Dipped cotton fabric.

Commonly used car models are: national standard QVR-105, Japanese standard AV, AVS, AVSS, AVX/AEX, German standard FLRY-B, FLRY-A, FLRYK-A, FLRYK-B, FLRYW-A, FLRYW-B, beauty GTE, GPT, GXL, SXL, TWE, TWP, TXL.

The principle of selection of the car wire is determined by the degree of insulation of the wire, the current passed and the required mechanical strength. For long-term electrical equipment, 60% of the actual current carrying capacity can be used; for short-time working equipment, the actual carrying capacity can be between 60% and 100%. 

The automotive electrical system is a low-voltage power supply with large operating current and large voltage loss. Excessive voltage loss will affect the normal operation of electrical equipment. Therefore, when the conductor cross section and selection, the voltage loss must not exceed a certain value: 12V system is not more than 0.5V, 24V system is not more than 1.0V. The actual operating current of the conductor shall not be greater than the allowable current carrying capacity of the conductor.